Develop Reference

Button listener and SimpleCursor adapter

I have a Fragment class that can display everything in my database in a ListView, and I have an inner class that extends SimpleCursorAdapter to use buttons within my ListView.
So in each element of my list view, I have several TextView's and 2 button. With my following code, I can use a button listener for a button inside my ListView. But inside my listener, I want to get the content of the TextView inside the same element that the button I click on. But When I click on a button to display my TextView, it display the last element of my ListView and I don't know why !
For example if I have 3 elements in my ListView like this :
_id = 1, name = "bob"
_id = 2, name = "john"
_id = 3, name = "bobby"
Each of these element are displayed with a button to display there ID, but if I click on the button inside bob, I get "id = 3". Same for john and bobby. And if I had a new element, I get his ID
My listener is in the bind function in my inner class MySimpleCursorAdapter.
Here is my Fragment Class :
public class ViewCardEditor extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> {
public static final String authority = "com.example.jean.cartememoire.CardContentProvider";
public String[] from;
public final int[] to = {R.id.idList, R.id.themeList, R.id.questionList, R.id.reponseList, R.id.difficultList};
StockCard stock;
ViewGroup container;
ListView listView;
MySimpleCursorAdapter adapter;
private ArrayList<String> data = new ArrayList<String>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup c,
Bundle savedInstanceState) {
container = c;
View view = inflater.inflate(R.layout.fragment_view_card_editor, container, false);
stock = new StockCard(c.getContext());
from = new String[]{stock._ID,
stock.THEME,
stock.QUESTION,
stock.REPONSE,
stock.DIFFICULTE};
// Inflate the layout for this fragment
if (container != null) {
container.removeAllViews();
}
//listView.setAdapter(new MyListAdapter(container.getContext(), R.layout.card_stock, data));
//View view_cs = LayoutInflater.from(container.getContext()).inflate(R.layout.card_stock, null);
//Supprimer = (Button) view_cs.findViewById(R.id.buttonDelete);
//Modifier = (Button) view_cs.findViewById(R.id.buttonModifier);
databaseView(view);
return view;
}
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
Uri.Builder builder = new Uri.Builder();
Uri uri = builder.scheme("content").authority(authority)
.appendPath(stock.STOCK_TABLE).build();
return new CursorLoader(container.getContext(), uri, from,
null, null, null);
}
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
adapter.swapCursor(data);
}
public void onLoaderReset(Loader<Cursor> loader) {
adapter.swapCursor(null);
}
public void databaseView(View view)
{
ArrayList<String> list;
Cursor cursor = stock.getData();
listView = (ListView) view.findViewById(R.id.listView);
adapter = new MySimpleCursorAdapter(container.getContext(), R.layout.card_stock, null, from, to,0);
listView.setAdapter(adapter);
LoaderManager manager = getLoaderManager();
manager.initLoader(0, null, this);
}
public void deleteOneCard(int id)
{
Uri.Builder builder = new Uri.Builder();
builder.scheme("content").authority(authority).appendPath(stock.STOCK_TABLE);
ContentUris.appendId(builder, id);
Uri uri = builder.build();
ContentResolver resolver = container.getContext().getContentResolver();
resolver.delete(uri, null, null);
}
private class MySimpleCursorAdapter extends SimpleCursorAdapter
{
ViewHolder vh;
public MySimpleCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int flags) {
super(context, layout, c, from, to, flags);
}
public View newView(Context _context, Cursor _cursor, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) _context.getSystemService(_context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.card_stock, parent, false);
vh = new ViewHolder();
vh.idList = (TextView) view.findViewById(R.id.idList);
vh.themeList = (TextView) view.findViewById(R.id.themeList);
vh.questionList = (TextView) view.findViewById(R.id.questionList);
vh.reponseList = (TextView) view.findViewById(R.id.reponseList);
vh.difficulteList = (TextView) view.findViewById(R.id.difficultList);
vh.Supprimer = (Button) view.findViewById(R.id.buttonDelete);
vh.Modifier = (Button) view.findViewById(R.id.buttonModifier);
view.setTag(vh);
return view;
}
public void bindView(View view, Context Context, Cursor cursor) {
vh.idList.setText(cursor.getString(cursor.getColumnIndex(stock._ID)));
vh.themeList.setText(cursor.getString(cursor.getColumnIndex(stock.THEME)));
vh.questionList.setText(cursor.getString(cursor.getColumnIndex(stock.QUESTION)));
vh.reponseList.setText(cursor.getString(cursor.getColumnIndex(stock.REPONSE)));
vh.difficulteList.setText(cursor.getString(cursor.getColumnIndex(stock.DIFFICULTE)));
vh.Supprimer.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
int id = Integer.parseInt(vh.idList.getText().toString());
Toast.makeText(container.getContext(), "bouton delete : "+id, Toast.LENGTH_LONG).show();
//Here everytime I hit the button, the last ID i put on the listView is displayed, no matter what Supprimer button I click
}
});
}
}
public class ViewHolder
{
Button Supprimer, Modifier;
TextView idList, themeList, questionList, reponseList, difficulteList;
}
}
And here is my layout for my TextView :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/relativeList"
android:descendantFocusability="blocksDescendants">
<TextView
android:text="#string/difficult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView8"
android:layout_below="#+id/textView7"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="29dp" />
<TextView
android:text="#string/r_ponse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView7"
android:layout_marginTop="20dp"
android:layout_below="#+id/textView6"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/idList"
android:layout_alignParentTop="true"
android:layout_alignLeft="#+id/themeList"
android:layout_alignStart="#+id/themeList"
tools:ignore="HardcodedText" />
<TextView
android:text="Question :"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView6"
android:layout_marginTop="14dp"
android:layout_below="#+id/textView4"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
tools:ignore="HardcodedText" />
<TextView
android:text="#string/id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView3"
android:layout_alignParentTop="true"
android:layout_alignRight="#+id/textView4"
android:layout_alignEnd="#+id/textView4" />
<TextView
android:text="Thème :"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView4"
android:layout_below="#+id/textView3"
android:layout_alignRight="#+id/textView6"
android:layout_alignEnd="#+id/textView6"
tools:ignore="HardcodedText" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/textView6"
android:id="#+id/questionList"
android:layout_toRightOf="#+id/themeList"
android:layout_toEndOf="#+id/themeList" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/textView8"
android:layout_alignLeft="#+id/questionList"
android:layout_alignStart="#+id/questionList"
android:id="#+id/reponseList" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/textView8"
android:layout_alignRight="#+id/reponseList"
android:layout_alignEnd="#+id/reponseList"
android:id="#+id/difficultList"
android:layout_toEndOf="#+id/reponseList"
android:layout_toRightOf="#+id/reponseList" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/themeList"
android:layout_marginLeft="33dp"
android:layout_marginStart="33dp"
tools:ignore="HardcodedText"
android:layout_below="#+id/idList"
android:layout_toRightOf="#+id/textView8"
android:layout_toEndOf="#+id/textView8" />
<Button
android:text="#string/supprimerb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="#+id/buttonDelete"/>
<Button
android:text="#string/modifierB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/buttonModifier"
android:layout_alignTop="#+id/questionList"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignLeft="#+id/buttonDelete"
android:layout_alignStart="#+id/buttonDelete" />
</RelativeLayout>
Thank you for help !

Probably vh.idList is containing last item view which is provided by last call of newView .
Get clicked row item id using findViewById and v parameter of onClick method:
public void onClick(View v) {
View parentView = (View)v.getParent();
TextView idList = parentView.findViewById(R.id.idList);
int id = Integer.parseInt(idList.getText().toString());
...
}

Button does not work inside a listview

This is the main Activity, Where a listview has some data and a button
it is show data,but whenever i clicked the button it does not work.
final String [] from = new String[]{AllDB.COLUMN_NAME, AllDB.COLUMN_AGE, AllDB.COLUMN_HEIGHT , AllDB.COLUMN_WEIGHT};
final int [] to = new int[]{R.id.nameTV,R.id.ageTV,R.id.heightTV,R.id.weightTV};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
dBmanegar = new AllDBmanegar(this);
dBmanegar.open();
final Cursor cursor = dBmanegar.fetch();
listView = (ListView) findViewById(R.id.list_view);
listView.setEmptyView(findViewById(R.id.emptyTV));
adapter = new SimpleCursorAdapter(this, R.layout.show_person_info, cursor, from, to,0);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//TextView idTextView = (TextView)view.findViewById(R.id.idTV);
TextView nameTextView = (TextView) view.findViewById(R.id.nameTV);
TextView ageTextView = (TextView) view.findViewById(R.id.ageTV);
TextView heightTextView = (TextView) view.findViewById(R.id.heightTV);
TextView weightTextView = (TextView) view.findViewById(R.id.weightTV);
Button diet = (Button) view.findViewById(R.id.diet);
diet.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent diet_P = new Intent(getApplicationContext(), Diet.class);
startActivity(diet_P);
}
});
//String iD = idTextView.getText().toString();
String name = nameTextView.getText().toString();
String age = ageTextView.getText().toString();
String height = heightTextView.getText().toString();
String weight = weightTextView.getText().toString();
Cursor cursor1 = (Cursor) parent.getItemAtPosition(position);
cursor1.moveToFirst();
//iD = cursor1.getString(cursor1.getColumnIndex(MyDB.COLUMN_ID));
Intent intent = new Intent(getApplicationContext(), Modify_person_info.class);
//intent.putExtra("_id",iD);
intent.putExtra("name", name);
intent.putExtra("age", age);
intent.putExtra("height", height);
intent.putExtra("weight", weight);
startActivity(intent);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.add_person,menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.add_person){
Intent intent = new Intent(this,Add_new.class);
startActivity(intent);
}else if (id == R.id.laout){
Intent backToHome = new Intent(this,MainActivity.class);
startActivity(backToHome);
finish();
}
return super.onOptionsItemSelected(item);
}
And this is the XML of SimpleCursorAdapter where it is display the data and button
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="3dp">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Name"
android:background="#f49c71"
android:id="#+id/nameTV"
android:layout_below="#+id/ageTV"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:textAppearance="?android:attr/textAppearanceSmall"
android:background="#bbbbff"
android:id="#+id/ageTV"
android:text="Age"
android:layout_below="#+id/heightTV"
android:layout_alignLeft="#+id/heightTV"
android:layout_alignStart="#+id/heightTV" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="3dp">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Height"
android:background="#f49c71"
android:id="#+id/heightTV"
android:layout_below="#+id/ageTV"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Weight"
android:background="#bbbbff"
android:id="#+id/weightTV"
android:layout_below="#+id/heightTV"
android:layout_alignLeft="#+id/heightTV"
android:layout_alignStart="#+id/heightTV" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/diet"
android:layout_weight=".5"
android:text="Add Diet"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/setText"/>
</LinearLayout>

Try to add this following attribute to Button from XML:
android:focusable="false"
If it didn't work, create a custom adapter for listview:
Custom Adapter for List View

ListView OnClickItemListener using textview and delete button

I have ListView in which in each row it has a textview and a delete button. The values for the list is from the sqlite database. I have successfully populate list from the database. My problem is that i do not know how to correctly implement the onClickItemListener for the textview and delete button. What i want is that when i click the textview, it will go another intent (based on its specific id from the database). And if i click the delete button, it will delete the item.
This is my code:
ListView listView ;
ArrayList<String> list;
public int goal_id;
int i = 0;
//database variables
MyDBAdapter dbhandler;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_set_act);
TypefaceProvider.registerDefaultIconSets();
Bundle extras = getIntent().getExtras();
if (extras == null) {
return;
}
goal_id = Integer.parseInt(extras.getString("goalid"));
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setSubtitle("Activities List");
ActionBar actionBar = getSupportActionBar();
actionBar.setHomeAsUpIndicator(R.drawable.ic_back);
actionBar.setDisplayHomeAsUpEnabled(true);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Added new activity", Snackbar.LENGTH_LONG)
.setAction("Added new activity", null).show();
onCLick_addAct();
}
});
dbhandler = new MyDBAdapter(this);
populateListView();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Long temp = listView.getItemIdAtPosition(position);
MessageTo.message(SetActActivity.this, Long.toString(temp));
}
});
}
public void populateListView(){
Cursor cursor = dbhandler.getAllActivitiesByGoalCursor(goal_id);
String[] actlist = new String[] {dbhandler.dbhandler.COLUMN_ACTIVITY_NAME};
int[] actNames = new int[] {R.id.list_item_string};
SimpleCursorAdapter myAdapter = new SimpleCursorAdapter(SetActActivity.this,R.layout.act_list,cursor,actlist,actNames,0);
//handle listview and assign adapter
listView = (ListView)findViewById(R.id.list);
// Attach cursor adapter to the ListView
listView.setAdapter(myAdapter);
}
public void onCLick_addAct(){
i++;
//to create activities
final Activities act = new Activities(goal_id,"Activity " + i, 0,1,1,1,0, false,0,0,0,0);
long temp = dbhandler.createActivity(act);
String temp2 = Long.toString(temp);
final int act_id = Integer.parseInt(temp2);
populateListView();
}
act_list.xml
<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:descendantFocusability="blocksDescendants">
<TextView
android:clickable="false"
android:focusable="false"
android:id="#+id/list_item_string"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:paddingLeft="15dp"
android:textSize="18sp"
android:textStyle="bold"
android:layout_row="0"
android:layout_column="0"
android:paddingRight="30dp" />
<Button
android:clickable="false"
android:focusable="false"
android:id="#+id/delete_btn"
android:layout_width="40dp"
android:layout_height="35dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="5dp"
android:layout_row="0"
android:layout_column="1"
android:background="#drawable/ic_delete" />
</GridLayout>

https://stackoverflow.com/a/7047141
See this post.
Xml also has onclick property. So try using it.

how to add button in custom row listview i want to delete database selected entry in listview

xml for save database please help me to## i want add delete button in listview's each row when button is pressed delete that data from listview and database ##
here is first xml file
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F3CAE5"
android:orientation="vertical"
android:padding="5dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/frst_txtV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="First name"
android:textColor="#000" />
<EditText
android:id="#+id/frst_editTxt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/frst_txtV" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/lst_txtV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="Last name"
android:textColor="#000" />
<EditText
android:id="#+id/last_editTxt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_toRightOf="#+id/lst_txtV" />
</LinearLayout>
<Button
android:id="#+id/save_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:text="Save"
android:textColor="#000" />
</LinearLayout>
display_activty.xml list view xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#B58897"
android:gravity="center_horizontal" >
<Button
android:id="#+id/btnAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:text="Add" />
<View
android:id="#+id/a"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_below="#+id/btnAdd"
android:background="#8DB3E1" />
<ListView
android:id="#+id/List"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/a"
android:divider="#8DB3E1"
android:dividerHeight="2dp" />
</RelativeLayout>
displayadapter.java here i add button if i press button than record is will delete from database as well from listview
public class DisplayAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<String> id;
private SQLiteDatabase dataBase;
private ArrayList<String> firstName;
private ArrayList<String> lastName;
public DisplayAdapter(Context c, ArrayList<String> id,ArrayList<String> fname, ArrayList<String> lname) {
this.mContext = c;
this.id = id;
this.firstName = fname;
this.lastName = lname;
}
public int getCount() {
// TODO Auto-generated method stub
return id.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
public View getView(final int pos, View child, ViewGroup parent) {
Holder mHolder;
LayoutInflater layoutInflater;
if (child == null) {
layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
child = layoutInflater.inflate(R.layout.listcell, null);
mHolder = new Holder();
mHolder.txt_id = (TextView) child.findViewById(R.id.txt_id);
mHolder.txt_fName = (TextView) child.findViewById(R.id.txt_fName);
mHolder.txt_lName = (TextView) child.findViewById(R.id.txt_lName);
mHolder.btn = (Button) child.findViewById(R.id.Button1);
child.setTag(mHolder);
} else {
mHolder = (Holder) child.getTag();
}
mHolder.txt_id.setText(id.get(pos));
mHolder.txt_fName.setText(firstName.get(pos));
mHolder.txt_lName.setText(lastName.get(pos));
mHolder.btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
}
});
return child;
}
public class Holder {
TextView txt_id;
TextView txt_fName;
TextView txt_lName;
Button btn;
//ImageView img;
}
}
listcell.xml this is to display custom listview xml file
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F3CAE5"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="8dp" >
<TextView
android:id="#+id/txt_id"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#000" />
<TextView
android:id="#+id/txt_fName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:textColor="#000" />
<TextView
android:id="#+id/txt_lName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:textColor="#000" />
<Button android:text="Button"
android:id="#+id/Button1"
android:focusable="false"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
DisplayActivty.java here is listview adding class
public class DisplayActivity extends Activity {
private DbHelper mHelper;
private SQLiteDatabase dataBase;
private ArrayList<String> userId = new ArrayList<String>();
private ArrayList<String> user_fName = new ArrayList<String>();
private ArrayList<String> user_lName = new ArrayList<String>();
private ListView userList;
private AlertDialog.Builder build;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.display_activity);
userList = (ListView) findViewById(R.id.List);
mHelper = new DbHelper(this);
//add new record
findViewById(R.id.btnAdd).setOnClickListener(new OnClickListener()
{
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(),
AddActivity.class);
i.putExtra("update", false);
startActivity(i);
}
});
//click to update data
userList.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Intent i = new Intent(getApplicationContext(),
AddActivity.class);
i.putExtra("Fname", user_fName.get(arg2));
i.putExtra("Lname", user_lName.get(arg2));
i.putExtra("ID", userId.get(arg2));
i.putExtra("update", true);
startActivity(i);
}
});
}
#Override
protected void onResume() {
displayData();
super.onResume();
}
/**
* displays data from SQLite
*/
private void displayData() {
dataBase = mHelper.getWritableDatabase();
Cursor mCursor = dataBase.rawQuery("SELECT * FROM "
+ DbHelper.TABLE_NAME, null);
userId.clear();
user_fName.clear();
user_lName.clear();
if (mCursor.moveToFirst()) {
do {
userId.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_ID)));
user_fName.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_FNAME)));
user_lName.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_LNAME)));
} while (mCursor.moveToNext());
}
DisplayAdapter disadpt = new DisplayAdapter(DisplayActivity.this,userId, user_fName, user_lName);
userList.setAdapter(disadpt);
mCursor.close();
}
}
Addactivty.java add database class
public class AddActivity extends Activity implements OnClickListener {
private Button btn_save;
private EditText edit_first,edit_last;
private DbHelper mHelper;
private SQLiteDatabase dataBase;
private String id,fname,lname;
private boolean isUpdate;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_activity);
btn_save=(Button)findViewById(R.id.save_btn);
edit_first=(EditText)findViewById(R.id.frst_editTxt);
edit_last=(EditText)findViewById(R.id.last_editTxt);
isUpdate=getIntent().getExtras().getBoolean("update");
if(isUpdate)
{
id=getIntent().getExtras().getString("ID");
fname=getIntent().getExtras().getString("Fname");
lname=getIntent().getExtras().getString("Lname");
edit_first.setText(fname);
edit_last.setText(lname);
}
btn_save.setOnClickListener(this);
mHelper=new DbHelper(this);
}
// saveButton click event
public void onClick(View v) {
fname=edit_first.getText().toString().trim();
lname=edit_last.getText().toString().trim();
if(fname.length()>0 && lname.length()>0)
{
saveData();
}
else
{
AlertDialog.Builder alertBuilder=new AlertDialog.Builder(AddActivity.this);
alertBuilder.setTitle("Invalid Data");
alertBuilder.setMessage("Please, Enter valid data");
alertBuilder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertBuilder.create().show();
}
}
/**
* save data into SQLite
*/
private void saveData(){
dataBase=mHelper.getWritableDatabase();
ContentValues values=new ContentValues();
values.put(DbHelper.KEY_FNAME,fname);
values.put(DbHelper.KEY_LNAME,lname );
System.out.println("");
if(isUpdate)
{
//update database with new data
dataBase.update(DbHelper.TABLE_NAME, values, DbHelper.KEY_ID+"="+id, null);
}
else
{
//insert data into database
dataBase.insert(DbHelper.TABLE_NAME, null, values);
}
//close database
dataBase.close();
finish();
}
}

Create Custom Array Adapter like this
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.inflatelistview, null);
TextView text=(TextView)vi.findViewById(R.id.textView1);
ImageView image=(ImageView)vi.findViewById(R.id.imageView1);
Button btn=(Button)vi.findViewById(R.id.button1);
btn.setTag(position);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Integer index = (Integer) v.getTag();
//items.remove(index.intValue());
data.remove(position);
notifyDataSetChanged();
}
});
text.setText("item "+position);
imageLoader.DisplayImage(data.get(position), image);
return vi;
}

As you're inserting (Addactivty.java add database class) and fetching (DisplayActivty.java here is listview adding class) data from database similarly you can delete.
For example :
public static boolean Delete(Context context, int id) {
SQLiteDatabase db = new MyDataBase(context).getWritableDatabase();
int res = db.delete(CATEGORY, ID + " = " + id, null);
if (db.isOpen())
db.close();
return (res == 0 ? false : true);
}
You need to delete data from database and listView inside the click listener,like :
mHolder.btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
//1. get the clicked item's *ID*
// (as you did id.get(pos), in your adapter class).
//2. delete data from database using this *ID*.
// (see above function).
//3. remove position from your list.
// list.remove(position);
// (in your case you've multiple lists remove position from all)
//4. notifyDataSetChanged();
}
});
Helping link :
notifyDataSetChanged();

Your choices are:
Use the functions of the ArrayAdapter to modify the underlying List (add(), insert(), remove(), clear(), etc.)
Re-create the ArrayAdapter with the new List data. (Uses a lot of resources and garbage collection.)
Create your own class derived from BaseAdapter and ListAdapter that allows changing of the underlying List data structure.
Use the notifyDataSetChanged() every time the list is updated. To call it on the UI-Thread, use the runOnUiThread() of Activity. Then, notifyDataSetChanged() will work.

autocompletetextview not working

I have a contact list and when I want to make a search in my list I want to use an autocompletetext view but it is not working.
When I start typing in autocomplete text view nothing appears, but when I click on the search button it finds me the contact I want.
here is my .java:
public class Search extends ListActivity {
private static int[] TO = {R.id.rowid,R.id.name, R.id.mobilephone, R.id.email };
private static String[] FROM = {_ID,DbConstants.NAME, DbConstants.PHONE, DbConstants.EMAIL, };
private Button sButton;
private ListView lv1;
private static SQLiteDatabase db;
private DbCreate contacts;
private Cursor cursor;
private EditText searchText;
protected SimpleCursorAdapter adapter;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.search);
searchText=(EditText)findViewById(R.id.searchtext);
sButton=(Button)findViewById(R.id.searchButton);
sButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
showDatabaseContent();
lv1 = getListView();
lv1.setTextFilterEnabled(true);
}
});
}
private Cursor getContacts() {
db = contacts.getReadableDatabase();
cursor = db.rawQuery("SELECT _id,name, phone, email FROM contactTest1 WHERE name LIKE ?",
new String[]{searchText.getText().toString()+"%"});
startManagingCursor(cursor);
return cursor;
}
public void showDatabaseContent(){
contacts = new DbCreate(this);
try {
cursor = getContacts();
showContacts(cursor);
} finally {
contacts.close();
db.close();
}
}
private void showContacts(Cursor cursor) {
//set up data binding
adapter = new SimpleCursorAdapter(this, R.layout.item, cursor, FROM, TO);
setListAdapter(adapter);
}
public void onListItemClick(ListView parent, View v, int position, long id) {
Intent abaintent = new Intent(this,Detalii.class);
Cursor cursor = (Cursor) adapter.getItem(position);
abaintent.putExtra("Contact_ID", cursor.getInt(cursor.getColumnIndex("_id")));
startActivity(abaintent);
}
}
here is my search.xml:
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk//android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<AutoCompleteTextView
android:id="#+id/searchtext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="searchDefault" >
<requestFocus />
</AutoCompleteTextView>
<Button android:id="#+id/searchButton"
android:text="Search"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>

Why do you have there
android:layout_weight="1"
?
I would remove it.